On Frequency Detection Capability of Full-Rate Linear and Binary Phase Detectors

Chung Hwan Son; Sangjin Byun

doi:10.1109/TCSII.2016.2603522

On Frequency Detection Capability of Full-Rate Linear and Binary Phase Detectors

Chung Hwan Son, Sangjin Byun

Department of Electronics & Electrical Engineering

Dongguk University

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Until now, it has been known that the full-rate linear and binary phase detectors (PDs) cannot detect the frequency difference between the received data and the recovered clock in clock and data recovery (CDR) loops. In this brief, we study the frequency characteristics of the full-rate linear and binary PDs and show that, unlike the binary PD, the linear PD has not only phase detection capability but also frequency detection capability intrinsically. According to our frequency-locked loop analysis, the locking trajectory of a referenceless CDR with only the full-rate linear PD in the single-loop architecture can be represented by using an exponential decay function with a single time constant. MATLAB Simulink simulations agree well with the predicted locking trajectory, which verifies that the full-rate linear PD has frequency detection capability.

Original language	English
Pages (from-to)	757-761
Number of pages	5
Journal	IEEE Transactions on Circuits and Systems II: Express Briefs
Volume	64
Issue number	7
DOIs	https://doi.org/10.1109/TCSII.2016.2603522
State	Published - Jul 2017

Keywords

Binary phase detector (PD)
clock and data recovery (CDR)
CMOS integrated circuits
frequency detection capability
linear PD

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10.1109/TCSII.2016.2603522

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title = "On Frequency Detection Capability of Full-Rate Linear and Binary Phase Detectors",

abstract = "Until now, it has been known that the full-rate linear and binary phase detectors (PDs) cannot detect the frequency difference between the received data and the recovered clock in clock and data recovery (CDR) loops. In this brief, we study the frequency characteristics of the full-rate linear and binary PDs and show that, unlike the binary PD, the linear PD has not only phase detection capability but also frequency detection capability intrinsically. According to our frequency-locked loop analysis, the locking trajectory of a referenceless CDR with only the full-rate linear PD in the single-loop architecture can be represented by using an exponential decay function with a single time constant. MATLAB Simulink simulations agree well with the predicted locking trajectory, which verifies that the full-rate linear PD has frequency detection capability.",

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AB - Until now, it has been known that the full-rate linear and binary phase detectors (PDs) cannot detect the frequency difference between the received data and the recovered clock in clock and data recovery (CDR) loops. In this brief, we study the frequency characteristics of the full-rate linear and binary PDs and show that, unlike the binary PD, the linear PD has not only phase detection capability but also frequency detection capability intrinsically. According to our frequency-locked loop analysis, the locking trajectory of a referenceless CDR with only the full-rate linear PD in the single-loop architecture can be represented by using an exponential decay function with a single time constant. MATLAB Simulink simulations agree well with the predicted locking trajectory, which verifies that the full-rate linear PD has frequency detection capability.

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On Frequency Detection Capability of Full-Rate Linear and Binary Phase Detectors

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